A series of alkaline tantalates (LiTaO₃, NaTaO₃, KTaO₃) prepared using citrate method were characterized by powder X-ray diffraction, nitrogen adsorption isotherms, Fourier transform infrared spectroscopy, diffuse reflectance spectroscopy-UV–Vis and differential thermogravimetric analysis techniques and evaluated as heterogeneous catalysts in selective oxidation of styrene towards benzaldehyde. An increase in the catalytic activity was observed with the atomic radii of the alkaline cation, attributed to the detected crystalline perovskite structure and presence of segregated phases. The largest styrene conversion (58.4 mol%) and benzaldehyde selectivity (77 mol%) was obtained for KTaO₃ with no significant loss of activity after six catalytic reuses.

利用粉末X射线衍射，氮吸附等温线，傅立叶变换红外光谱，漫反射光谱-UV-Vis和差示热重分析技术对柠檬酸盐制备的一系列碱性钽酸盐（LiTaO ₃，NaTaO ₃，KTaO ₃）进行了表征。在苯乙烯向苯甲醛的选择性氧化中作为多相催化剂被评估。观察到碱性阳离子的原子半径使催化活性增加，这归因于所检测到的结晶钙钛矿结构和偏析相的存在。对于KTaO ₃获得最大的苯乙烯转化率（58.4 mol％）和苯甲醛选择性（77 mol％） 重复使用六次催化后，活性没有明显损失。